Manuel Simon Hirsig
62 lines
1.9 KiB
Lua
62 lines
1.9 KiB
Lua
function Aux_module()
|
|
local data, is_public, is_declared, public_interface, private_interface, public, private = {}, {}, {}, {}, {}, {}, {}
|
|
setmetatable(public_interface, {
|
|
__newindex = function()
|
|
error('Unsupported operation.', 2)
|
|
end,
|
|
__index = function(_, key)
|
|
if not is_public[key] then
|
|
error('Read of undeclared "'..key..'".', 2)
|
|
end
|
|
if is_public[key] then
|
|
return data[key]
|
|
end
|
|
end,
|
|
__call = function(_, key)
|
|
return is_public[key]
|
|
end
|
|
})
|
|
setmetatable(private_interface, {
|
|
__newindex = function(_, key, value)
|
|
if not is_declared[key] then
|
|
error('Write of undeclared "'..key..'".', 2)
|
|
end
|
|
data[key] = value
|
|
end,
|
|
__index = function(_, key)
|
|
if not is_declared[key] then
|
|
error('Read of undeclared "'..key..'".', 2)
|
|
end
|
|
return data[key]
|
|
end,
|
|
__call = function(_, key)
|
|
return is_declared[key]
|
|
end
|
|
})
|
|
setmetatable(public, {
|
|
__newindex = function(_, key, value)
|
|
if is_declared[key] then
|
|
error('Multiple declarations of "'..key..'".', 2)
|
|
end
|
|
data[key] = value
|
|
is_public[key] = true
|
|
is_declared[key] = true
|
|
end,
|
|
__index = function()
|
|
error('Unsupported operation.', 2)
|
|
end,
|
|
})
|
|
setmetatable(private, {
|
|
__newindex = function(_, key, value)
|
|
if is_declared[key] then
|
|
error('Multiple declarations of "'..key..'".', 2)
|
|
end
|
|
data[key] = value
|
|
is_declared[key] = true
|
|
end,
|
|
__index = function()
|
|
error('Unsupported operation.', 2)
|
|
end,
|
|
})
|
|
return { public_interface, private_interface, public, private }
|
|
end |